Laboratory requisition form provides information about the laboratory test being requested for. They carry demographic data of patient, patient identification number, name of doctor, clinical findings, information about any other relevant test if done. Research has demonstrated that most laboratory errors occur in the preanalytical phase of testing. In view of the paucity of studies examining preanalytical errors, we evaluated our FNAC requisition forms and a retrospective study was conducted in department of pathology. All the FNAC requisition forms received during the period of January to August 2019 were retrieved from the archives and analyzed for completion of preanalytical data. Results were expressed in percentage and depicted in tabular form. In our study we have seen that patient name, age, sex, were mentioned in 100% of FNAC requisition forms which were most completely provided data, followed by patient IP number (99%), doctors signature (95%) and site of FNAC (95%). Patient occupation was mentioned in 2% of FNAC requisition forms, which was the least provided data, followed by patient contact number (7%), relevant investigations (24%) and address (26%). Out of 200 requisition forms only 2% were complete and 98% of the requisition forms had one or more missing data. As laboratory data influence medical diagnoses, incorrect or incomplete data provided to laboratory could significantly impart the success and cost of overall treatment.